<?php
/**
 * Zend Framework
 *
 * LICENSE
 *
 * This source file is subject to the new BSD license that is bundled
 * with this package in the file LICENSE.txt.
 * It is also available through the world-wide-web at this URL:
 * http://framework.zend.com/license/new-bsd
 * If you did not receive a copy of the license and are unable to
 * obtain it through the world-wide-web, please send an email
 * to license@zend.com so we can send you a copy immediately.
 *
 * @category   Zend
 * @package    Zend_Filter
 * @copyright  Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)
 * @license    http://framework.zend.com/license/new-bsd     New BSD License
 * @version    $Id: Encrypt.php 20096 2010-01-06 02:05:09Z bkarwin $
 */

/**
 * @see Zend_Filter_TwoWay
 */
require_once 'Zend/Filter/TwoWay.php';

/**
 * Encodes a given string
 *
 * @category   Zend
 * @package    Zend_Filter
 * @copyright  Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)
 * @license    http://framework.zend.com/license/new-bsd     New BSD License
 */
class Zend_Filter_Encode extends Zend_Filter_TwoWay
{
    /**
     * Class constructor
     *
     * @param string|array $options (Optional) Options to set, if null base64 is used
     */
    public function __construct($options = null)
    {
        parent::_setDefaultNamespace('Zend_Filter_Encode');
        parent::_setDefaultAdapter('Base64');
        parent::__construct($options);
    }

    /**
     * Sets a new adapter
     *
     * @param  string|array $options (Optional) Adapter with Options
     * @return Zend_Filter_TwoWay
     */
    public function setAdapter($options = null)
    {
        parent::setAdapter($options);
        if (!$this->_adapter instanceof Zend_Filter_Encode_AbstractEncode) {
            require_once 'Zend/Filter/Exception.php';
            throw new Zend_Filter_Exception("Adapter '" . $adapter . "' does not extend from Zend_Filter_Encode_AbstractEncode");
        }

        return $this;
    }
}
